"The Corsair HX750W is an 80 Plus Silver certified power supply and the figures obtained during testing confirmed this with the efficiency peaking at a massive 90% on 230VAC. Combine the excellent efficiency with top notch DC voltage load regulation and low ripple/noise on all the rails, and the Corsair HX750W is up there with the best. The box lid carries the Nvidia SLI Ready logo, but I wasn't able to confirm this on the Nvidia SLI website, so perhaps it will appear in the next update. The Corsair HX750W has four 6+2-pin PCI-E connectors, making it the ideal power supply for any high end SLI or Crossfire configuration, especially when you consider it delivered 50A on the 12V rail with very low noise."